The trigger of the story is an explosion in a juvenile correctional center. Ten-year-old Zhou Luoke was sent to a juvenile correctional center after his father, Zhou Xiangyuan, killed his mother. In order to hide the incident, Zhou Xiangyuan bribed the guards at the juvenile correctional center to stage an explosion. Fortunately, Zhou Luoke escaped. Then he met Su Lingyi, the director of the orphanage, and four children who were orphans at the same time. Later, the five of them established a detective agency. Eight years later, Zhou Luoke was adopted by Zhou Xiangyuan's ex-girlfriend Lin Youxian, and was involved in her revenge plan. The people involved in Jing Wei's murder have secretly returned to Jiangcheng over the years. Zhou Xiangyuan is faced with one conspiracy and calculation after another. What will be the outcome?